The first 2 photos below are the menus I get while playing a DVD-Audio via DLINK with 5910CI. The next photo is the menu I get when the 5910CI is OFF. The last photo is the menu I get with the DVR-1 input selected which I am using with my TIVO PREMIERE.
As you can see, for each instance, the menu is slightly different.
Playing Sherlock Holmes here, if your unit has the same GUI and internal hardware as mine, we should be able to figure out the difference between your configuration and mine and get the two to be identical. If, however, my unit, being a later build, may be somewhat different, then I would have to say you may have a problem or conflict with your unit as you originally posted either as a result of the firmware update or a conflict with something in the configuration that is not allowing your GUI to operate properly. Just my guess. This unit is very complex and has some oddities. I already posted an issue on the AVSFORUM regarding the TV/CBL input and HDMI Control (CEC) so it wouldn't surprise me that there are other "issues" out there.
Let me know if I can help you troubleshoot. I love a good puzzle.
BTW, my unit model number is AVP-A1HDACI (There is a large A marked on the box). Denon shows an AVP-A1HDCI (A) so I am guessing mine would be the same although the A is not in the same spot in the alpha numeric sequence.